From a tense split to a standoff with the Pentagon: A timeline of Anthropic and OpenAI's rivalry

Sam Altman and Dario Amodei's hands did not make contact, and the internet noticed.

Ludovic MARIN / AFP via Getty Images

• Sam Altman and Dario Amodei went viral for refusing to join together in a sign of unity.
• Once colleagues, the two AI CEOs have helped nurse their companies' rivalry.
• Here's how OpenAI and Anthropic finally reached this point.

If you want to know one of the biggest rivalries in AI, just ask for a show of hands.

Recently, OpenAI CEO...